Nebra is an organization focused on Blockchain and zero-knowledge proof research, aiming to democratize zero-knowledge proof technology to reduce proof settlement costs on Ethereum and other blockchains. By developing the first proof aggregation service on Ethereum, Nebra utilizes Universal ZK-ZK Proof Aggregation construction to aggregate Zero-Knowledge Proofs for diverse applications, including privacy-preserving identities, storage proofs, ZKML, and zkEVM proofs.